Capacitance Measurements - Keysight 34450A Guia Del Usuario

Capacitance measurements

The multimeter implements capacitance measurements by applying a known
current to the capacitor as shown below:
Figure 3-6
Capacitance is calculated by measuring the change in voltage (V) that occurs
over a "short aperture" time, (t). The measurement cycle consists of two parts: a
charge phase and a discharge phase.
The change in voltage (V) and "short aperture" time (t), vary by range, in order
to minimize noise and increase reading accuracy. The following table lists the
current source and reading rate at full scale during the measurement.
Range
1 nF
10 nF
100 nF
1 μF
10 μF
100 μF
1 mF
10 mF
Keysight 34450A User's Guide
Applying current to the capacitor
Current Source
100 nA
100 nA
1 A
μ
1 A
μ
10 μA
100 μA
500 μA
1 mA
Measurement Tutorial
Reading Rate at Full Scale
1.0/second
0.5/second
1.5/second
0.25/second
0.25/second
0.25/second
0.25/second
0.15/second
3
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